diff --git a/spring/webflux/webclient.md b/spring/webflux/webclient.md
index 6f9a1ca..59af3fb 100644
--- a/spring/webflux/webclient.md
+++ b/spring/webflux/webclient.md
@@ -38,3 +38,59 @@ WebClient client2 = client1.mutate()
 
 // client2 has filterA, filterB, filterC, filterD
 ```
+### MaxInMemorySize
+Codecs对于缓存在内存中的数据大小存在限制，避免导致应用的内存问题。默认情况下，该值被设置为`256KB`，如果该大小不够，那么将会见到如下报错：
+```
+org.springframework.core.io.buffer.DataBufferLimitException: Exceeded limit on max bytes to buffer
+```
+如果想要修改该默认的codecs限制，可以使用如下配置：
+```java
+WebClient webClient = WebClient.builder()
+		.codecs(configurer -> configurer.defaultCodecs().maxInMemorySize(2 * 1024 * 1024))
+		.build();
+```
+
+### reactor netty
+为了自定义reactor netty配置，可以提供一个预先定义的`HttpClient`
+```java
+HttpClient httpClient = HttpClient.create().secure(sslSpec -> ...);
+
+WebClient webClient = WebClient.builder()
+		.clientConnector(new ReactorClientHttpConnector(httpClient))
+		.build();
+```
+#### Resources
+默认情况下，`HttpClient`将会参与使用`reactor.netty.http.HttpResources`中保存的全局reactor netty resources。
+
+`HttpResources`中包含event loop threads和connection pool，HttpClient会使用这些共享的资源。对于基于event loop的并发，更倾向使用固定、共享的资源，直到进程退出时这些全局资源才会被释放。
+
+如果server的生命周期和进程相同，那么对全局资源无需手动释放。但若server在进程的生命周期中可能会启动和停止，那么可以声明一个`ReactorResourceFactory`类型的bean，并设置`globalResources=true`（默认），从而确保reactor netty的global resource在`ApplicationContext`关闭时被释放，示例如下所示:
+```java
+@Bean
+public ReactorResourceFactory reactorResourceFactory() {
+	return new ReactorResourceFactory();
+}
+```
+
+也可以不使用global reactor netty resources，但是，在该模式下，你需要确保所有reactor netty client and server使用共享的资源，示例如下所示：
+```java
+@Bean
+public ReactorResourceFactory resourceFactory() {
+	ReactorResourceFactory factory = new ReactorResourceFactory();
+	factory.setUseGlobalResources(false); 
+	return factory;
+}
+
+@Bean
+public WebClient webClient() {
+
+	Function<HttpClient, HttpClient> mapper = client -> {
+		// Further customizations...
+	};
+
+	ClientHttpConnector connector =
+			new ReactorClientHttpConnector(resourceFactory(), mapper); 
+
+	return WebClient.builder().clientConnector(connector).build(); 
+}
+```